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Kubota Z1300 Engine

General Technical Data

Kubota Z1300 Engine Specifications

Engine Model .......... Kubota Z1300
Engine Type .......... Vertical, 4-Stroke 2-Cylinder Diesel
Number of Cylinders .......... 2
Bore, mm (in) .......... 90.0 (3.57)
Stroke, mm (in) .......... 100.0 (3.97)
Displacement, cm3 (cu. in.) .......... 1272 (77.7)
Gross Power, kw (hp) .......... 19.4 (26.0)
Rated Speed, rpm .......... 2600
Maximum Torque, Nm (lb-ft) .......... 79.7 (58.8)
Torque Speed, rpm .......... 1600
Slow Idle Speed, rpm .......... 600-650
High Idle Speed, rpm .......... 2850
Compression Ratio .......... 21.5:1
Firing Order .......... 1-2

Fuel System

Injection Timing (BTDC), deg .......... 20
Timing Mark Location .......... Flywheel
Injection Pressure, MPa (psi) .......... 11.73 (1700)

Electrical System

Electrical System, Volts .......... 12
Starter Rating .......... 12V, 2.0 kw
Battery, Capacity, Amp/hr .......... 110
Ground Polarity .......... Negative

Dimensions

Length, mm (in.) .......... 400.0 (15.9)
Width, mm (in.) .......... 455.0 (18.1)
Height, mm (in.) .......... 554.0 (22.0)
Dry weight, kg (lbs.) .......... 115.0 (253)

Kubota Z1300 Maintenance Data

Fuel type .......... Diesel fuel No. 2-D
Engine oil type .......... SAE 80
Lubricant type .......... DS or DM
Engine oil capacity, L (qts) .......... 4.8 (5.1)
Coolant capacity, L (qts) .......... 6.85 (7.11)
Oil filter change interval .......... Every 200 hours
Oil change interval .......... Every 200 hours
Fuel filter change interval .......... Every 400 hours

Kubota Z1300 Service Specifications

Cylinder Block

Cylinder Sleeve Diameter, mm (in) .......... 89.88-89.90 (3.5384-3.5392)
Cam Height (Intake and Exhaust), mm (in) .......... 36.87 (1.4516)
Piston Skirt Diameter, mm (in) .......... 89.9-89.92 (3.539-3.540)
Piston Ring End Gap, mm (in) .......... 0.3-0.5 (0.012-0.020)
Second Compression Ring, Side Clearance, mm (in) .......... 0.065-0.09 (0.0025-0.0035)
Oil Control Ring, Side Clearance, mm (in) .......... 0.02-0.06 (0.0008-0.0024)
Crankshaft Main Journal, Diameter, mm (in) .......... 62.93-62.94 (2.4789-2.4802)
Crankshaft Main Journal, Rear Bearing Clearance, mm (in) .......... 0.05-0.114 (0.002-0.0045)
Crankshaft Main Journal, Front Bearing Clearance, mm (in) .......... 0.009-0.107 (0.0004-0.0042)
Crankshaft Crankpin Journal Diameter, mm (in) .......... 58.76-58.80 (2.3135-2.3150)
Crankshaft Crankpin Journal, Bearing Clearance, mm (in) .......... 0.02-0.08 (0.0008-0.003)
Crankshaft Crankpin Journal Side Clearance, mm (in) .......... 0,4-0.6 (0.016-0.024)
Crankshaft End Play, mm (in) .......... 0.2-0.36 (0,008-0.014)
Backlash Between Crankshaft Gear and Camshaft Gear, mm (in) .......... 0.07-0.15 (0.003-0.006)
Camshaft End Play, mm (in) .......... 0.07-0.132 (0.0028-0.005)
Camshaft Journal Diameter (Front Bearing), mm (in) .......... 50.0-50.03 (1.9685-L9695)
Camshaft Journal Diameter (Rear Bearing), mm (in) .......... 31.07-32.03 (1.2572-1.2579)
Camshaft Journal, Rear Bearing Clearance, mm (in) .......... 0.02-0.101 (0.0008-0.004)
Camshaft Journal, Front Bearing Clearance, mm (in) .......... 0.05-0,1 (0.002-0.004)
Backlash Between Two Gears In Timing Gear, mm (in) .......... 0.04-0.12 (0.0015-0.0045)
Piston Pin, Diameter, mm (in) .......... 28.1 (1.102)
Piston Pin, Clearance, mm (in) .......... 0.029-0.053 (0,0011-0.002)
Piston Skirt to Cylinder Clearance, mm (in) .......... 0.08-0.12 (0.003-0.0048)
Idle Gear Side Clearance, mm (in) .......... 0.20-0.50 (0.008-0.020)
Idle Gear Shaft to Idle Gear Bushing, Clearance, mm (in) .......... 0.020-0.05 (0.001-0.002)

Cylinder Head

Valve Tappet Gap (Cold), mm (in) .......... 0.20-0.25 (0.008-0.010)
Valve Stem Diameter (Intake and Exhaust), mm (in) .......... 8.96-8.975 (0.3527-0.3533)
Valve Face Angle, degrees .......... 45
Valve Seat Angle, degrees .......... 45
Valve Seat Width, mm (in) .......... 1.5 (0.060)
Valve Springs Free Length, mm (in) .......... 47.5 (1.885)
Rocker Arm Shaft-Rocker Arm, Clearance, mm (in) .......... 0.02-0.08 (0.0008-0.003)

Tightening Torque Specs

Cylinder head screw, Nm (ft.-lbs) .......... 170-184 Nm (125-135)
Connecting rod screw, Nm (ft.-lbs) .......... 58-64 (43-47)
Flywheel screw, Nm (ft.-lbs) .......... 109-116 (80-85)
Idle gear shaft screws, Nm (ft.-lbs) .......... 32.4-37.3 (23.9-27.5)
Bearing case cover mounting screw, Nm (ft.-lbs) .......... 49.0-68.6 (36.2-50.6)

KUBOTA TRACTORS TROUBLESHOOTING
L235	L2501	L2550	L275	L3110
L3301	L35	L3710	L3901	L4310
L5030	M4700	M5700	M6040	M6800
M8200	M8540	M9000	MX5100	MX5200